BISE Gujranwala · Class 11 · Chemistry

BISE Gujranwala · Class 11 · Chemistry · 2025 · First Annual · Group 2

2025 · First Annual

Transcribed from the identified examination paper. Check the board, session and course before use. SchoolOrbit is not affiliated with the issuing board.

Objective

Source code: 6482 · Printed marks: 17 · Time: 20 Minutes

CHEMISTRY

Intermediate Part-I (11th) (1st A 325-I)

Paper: I

Second Group

OBJECTIVE

Code: 6482

Roll No. of Candidate :

You have four choices for each objective type question as A, B, C and D. The choice which you think is correct, fill that circle in front of the relevant question number. Use marker or pen to fill in the circles. Cutting or filling of two or more circles will result zero mark in that question.

Q. No. 1

1
The mass of one mole of electrons is
- (A)
  $1.008 m g$
- (B)
  $0.55 m g$
- (C)
  $0.184 m g$
- (D)
  $1.673 m g$
2
One mole of $S O_{2}$ contains
- (A)
  $6.02 \times 10^{23}$ atoms of Oxygen
- (B)
  $18.1 \times 10^{23}$ molecules of $S O_{2}$
- (C)
  $6.02 \times 10^{23}$ atoms of Sulphur
- (D)
  4 gram atoms of $S O_{2}$
3
The most common laboratory example of solvent extraction is
- (A)
  Benzene extraction
- (B)
  Hexane extraction
- (C)
  Ether extraction
- (D)
  Water extraction
4
The critical temperature of Ammonia is
- (A)
  $- 118.75 K$
- (B)
  $400 K$
- (C)
  $200 K$
- (D)
  $405.6 K$
5
Pressure remaining constant, at which temperature the volume of a gas will become twice of what it is at $0^{\circ} C$
- (A)
  $546^{\circ} C$
- (B)
  $200^{\circ} C$
- (C)
  $546 K$
- (D)
  $273 K$
6
The molar heat of vapourization of water is
- (A)
  $20.6 K J / m o l$
- (B)
  $30.6 K J / m o l$
- (C)
  $40.6 K J / m o l$
- (D)
  $50.6 K J / m o l$
7
When water freezes at $0^{\circ} C$ its density decreases due to
- (A)
  Cubic structure of ice
- (B)
  Empty spaces present in the structure of ice
- (C)
  Change of bond length
- (D)
  Change of bond angles
8
Splitting of spectral lines when atoms are subjected to a strong electric field is called
- (A)
  Zeeman effect
- (B)
  Stark effect
- (C)
  Photoelectric effect
- (D)
  Compton effect
9
When 6d orbital is complete, the entering electron goes in to
- (A)
  7 f
- (B)
  7 s
- (C)
  7 p
- (D)
  7 d
10
The number of bonds in Nitrogen molecule is
- (A)
  One $σ$ One $π$
- (B)
  One $σ$ Two $π$
- (C)
  Three sigma only
- (D)
  Two $σ$ One $π$
11
Which has Zero dipole moment
- (A)
  $N H_{3}$
- (B)
  $C H C l_{3}$
- (C)
  $H_{2} O$
- (D)
  $B F_{3}$
12
Calorie is equivalent to
- (A)
  $0.4184 J$
- (B)
  $41.84 J$
- (C)
  $4.184 J$
- (D)
  $418.4 J$
13
The pH of $10^{- 3}$ moles $d m^{- 3}$ of an aqueous solution of $H_{2} S O_{4}$ is
- (A)
  3.0
- (B)
  2.7
- (C)
  2.0
- (D)
  1.5
14
The solubility product of $A g C l$ is $2 \times 10^{- 10} m o l^{2} d m^{6}$ . The maximum concentration of ${A g}^{+}$ ions in the solution is
- (A)
  $2.0 \times 10^{- 10} m o l d m^{- 3}$
- (B)
  $1.41 \times 10^{- 5} m o l d m^{- 3}$
- (C)
  $1.0 \times 10^{- 10} m o l d m^{- 3}$
- (D)
  $4.0 \times 10^{- 20} m o l d m^{- 3}$
15
Stronger the oxidizing agent, greater is the
- (A)
  Reduction potential
- (B)
  Oxidation potential
- (C)
  Redox potential
- (D)
  E.M.F of the cell
16
Molarity of pure water is
- (A)
  55.5
- (B)
  1
- (C)
  18
- (D)
  6
17
In zero order reaction, the rate is independent of
- (A)
  Concentration of reactants
- (B)
  Temperature
- (C)
  Concentration of products
- (D)
  None of these
218-(I)-1st A 325-28000

Subjective

Source code: 218 · Printed marks: 68 · Time: 2:40 Hours

CHEMISTRY

Intermediate Part-I(11th) (1st A 325)

Paper: I

Second Group

SUBJECTIVE

Note: Section I is compulsory. Attempt any THREE (3) questions from Section II.

SECTION – I

2.

Write short answers to any EIGHT (8) questions.

2x8 = 16

i -
What conditions are assumed during stoichiometric calculations?
ii -
Justify the statement that $23 g$ of Sodium and $238 g$ of Uranium have equal number of atoms in them.
iii -
Define molar volume. Write down one example.
iv -
State distribution law.
v -
Write down uses of chromatography.
vi -
What is absolute zero?
vii -
Derive value and unit of 'R' in SI system.
viii -
What is Dalton's Law of Partial Pressures?
ix -
How is Copper purified by electrolytic cell?
x -
What is standard Hydrogen electrode?
xi -
Differentiate between instantaneous rate and average rate of reaction.
xii -
What is first order reaction? Write down one example.

3.

Write short answers to any EIGHT (8) questions.

2x8 = 16

i -
Why Flourine is a gas and Iodine is solid?
ii -
Earthenware Vessels keep water cool. Justify.
iii -
Differentiate between amorphous and crystalline solids.
iv -
Define symmetry. What are symmetry elements?
v -
Write down two properties of cathode rays.
vi -
What is atomic absorption spectrum?
vii -
Differentiate between frequency and wave number.
viii -
State Hund's Rule.
ix -
Calculate pH of $10^{- 4} m o l . d m^{- 3}$ of $B a (O H)_{2}$
x -
The solubility of glucose in water is increased by increasing the temperature. Write down reason.
(Turn Over)
- 2 -
xi -
A mixture of $N H_{4} O H$ and $N H_{4} C l$ give basic buffer. Justify it.
xii -
How the $K_{c}$ predicts the direction of reaction?

4.

Write short answers to any SIX (6) questions.

2x6 = 12

i -
Why Oxygen molecule is paramagnetic in nature?
ii -
Differentiate between a sigma bond and pi bond.
iii -
Bond angle in water is ${104.5}^{\circ}$ instead of ${109.5}^{\circ}$ . Write down reason.
iv -
Differentiate between coordinate covalent bond and covalent bond.
v -
Define heat and work.
vi -
Define spontaneous reaction.
vii -
Define molarity. Write down its formula and unit.
viii -
What is cryoscopic constant? Write down one example.
ix -
Write down any two properties of ideal solution.

SECTION – II

5 -
(a)
A well-known ideal gas is enclosed in a container having volume $500 c m^{3}$ at STP. Its mass comes out to be $0.72 g$ . What is the molar mass of this gas?
(4)
(b)
Write down graphical explanation of Boyle's Law.
(4)
6 -
(a)
What are ionic solids? Write down any six properties of ionic solids.
(4)
(b)
Draw MOT diagrams of $O_{2}$ and $N_{2}$ molecules.
(4)
7 -
(a)
Derive the equation for the radius of $n^{t h}$ orbital of Hydrogen atom using Bohr's Model.
(4)
(b)
Draw a complete, fully labelled Born-Haber cycle for the formation of Sodium Chloride ( $N a C l$ ).
(4)
8 -
(a)
How the nature of reactants and concentration of reactants affect the rate of reaction.
(4)
(b)
$C a (O H)_{2}$ is sparingly soluble compound. Its solubility product is $6.5 \times 10^{- 6}$ . Calculate the solubility of $C a (O H)_{2}$ .
(4)
9 -
(a)
Define the following with one example of each:

i) A concentrated solution ii) A consulate temperature

iii) Conjugate solution iv) Heat of hydration
(4)
(b)
Define electrode potential. Write down measurement of electrode potential of Copper.
(4)
218-1st A 325-28000

Original source references (2)

The original files and numbering are retained. Equivalent files do not repeat the questions above.

Objective · 6482 · Printed marks: 17 · Time: 20 Minutes
Subjective · 218 · Printed marks: 68 · Time: 2:40 Hours